CNBC's Squawk Box reported Tuesday on the impact of former President Donald Trump's proposed tariffs on the economy if he is reelected in November. Steve Liesman, a senior economic reporter at the network, broke down the numbers and said Trump's tariffs would amount to a $3.9 trillion tax hike. New estimates of the revenue raised from former President Trump's proposed tariffs would make it potentially one of the biggest tax hikes in decades. And senior economics reporter Steve Liesman joins us with the details," began host Joe Kernen. Yeah, the conservative American Enterprise Institute says the tariffs proposed by former President Trump, 20% on all imports to the U.S. across-the-board, would cost Americans as much as $3.9 trillion," began Liesman referring to the conservative think tank.